3 Tinker Broke All The Rules In Magic , powerful cards or combos tend to be limited by three things: the amount of mana a player has, the need to draw them, and the inherent randomness of a deck of cards
A walker that gives you creature tokens while raising its loyalty is already quite good, because it provides protection for Guff
Winter lets all players draw two cards at the start of your upkeep, which is a huge boost to your hand, as well as for your opponents
In Commander, Tajic's low cost means it is likely the first commander on the board, and with three power, its commander damage stacks quickly
Maybe some kind Dimir discard ramp control deck, so your opponent does not have the cards to take advantage of the free spell part
Klothys, God of Destiny Klothys, God of Destiny was introduced in Theros Beyond Death as a replacement for Xenagos, God of Revels after they took a deserved visit to Nyx